SOLUTION: the length of a rectangle is 6 cm more than three times its width. the area of the rectangle is 144 cm squared. find the dimensions of the rectangle

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Question 878468: the length of a rectangle is 6 cm more than three times its width. the area of the rectangle is 144 cm squared. find the dimensions of the rectangle
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
L length, w width.

L=6+3w and wL=144.

w%283w%2B6%29=144
3w%5E2%2B6w-144=0
w%5E2%2B2w-48=0
%28w-6%29%28w%2B8%29=0...
.
Finish it,...